Modeling Energy Consumption in Single-Hop IEEE 802.11 Ad Hoc Networks
CALIFORNIA UNIV SANTA CRUZ DEPT OF COMPUTER ENGINEERING
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This paper presents an analytical model to predict energy consumption in saturated IEEE 802.11 single-hop ad hoc networks under ideal channel conditions. The model we introduce takes into account the different operational modes of the IEEE 802.11 DCF MAC, and is validated against packet level simulations. In contrast to previous works that attempted to characterize the energy consumption of IEEE 802.11 cards in isolated, contention-free channels i.e., single senderreceiver pair, this paper investigates the extreme opposite case, i.e., when nodes need to contend for channel access under saturation conditions. In such scenarios, our main findings include 1 contrary to what most previous results indicate, the radios transmit mode has marginal impact on overall energy consumption, while other modes receive, idle, etc. are responsible for most of the energy consumed 2 the energy cost to transmit useful data increases almost linearly with the network size and 3 transmitting large payloads is more energy efficient under saturation conditions.
- Computer Systems
- Radio Communications